Period weird

Dulce

So Saturday on 28 of February I was spotting blood which is 5 days before my period the next day I noticed more thought it was my period because when I wiped it was visible so I put a tampon in nothing but brown blood. Then the next day same thing. Woke up today completely dry. Yes I took a test those days all negative. I don’t know what going on but one doctor says what can fix you’re hormones is birth control. Umm no I feel something wrong so what could it be